CMake: Make libint2 Fortran interface explicit#423
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Libint2 currently installs the
libint_f.modmodule file without exporting a corresponding CMake target. As a result, downstream projects have to locate compiler-specific Fortran module directories manually.Introduce an installable
int_fwrapper library, exported asLibint2::int_f. Linking this target provides the Fortran wrapper library, the underlying Libint2 library, and the correct module include directory through its usage requirements.The Fortran module installation directory is now controlled by
CMAKE_INSTALL_Fortran_MODULES, defaulting to the existing include-directory location. Distribution packages (Fedora RPM-build) can override it at configure time, avoiding post-install relocation oflibint_f.mod.This allows downstream projects to consume the Fortran interface through the exported package metadata rather than searching for
libint_f.modthemselves.